fix: update templates to KiCAD 9 format + remove corrupt _TEMPLATE_ blocks

Verified by live test: created a fresh schematic via MCP, result shows
format version 20250114, 0 _TEMPLATE_ hits, 0 (lib_id -100) hits, 24
real components placed cleanly.

--- Format version bump (20230121 KiCAD 7 -> 20250114 KiCAD 9) ---
Files: python/templates/*.kicad_sch, python/commands/project.py,
       python/commands/schematic.py

Root cause: the MCP server targets KiCAD 9 exclusively - pcbnew.pyd is
compiled for KiCAD 9.0 / Python 3.11.5, and server.ts explicitly selects
the KiCAD 9 bundled Python on Windows. Generating new schematics with a
2-year-old format tag caused a spurious 'This file was created with an
older KiCAD version' warning on every newly created schematic.

--- Remove corrupt _TEMPLATE_* placed-symbol blocks ---
File: python/templates/template_with_symbols_expanded.kicad_sch

Root cause: the expanded template was generated by the old sexpdata
serializer (same corruption PR #40 fixed for DynamicSymbolLoader add-path).
The serializer converted the string 'Device:R' to integer -100, producing
(lib_id -100) instead of (lib_id Device:R). KiCAD cannot resolve an
integer as a library reference and crashes with a null-pointer when the
user attempts to select these symbols. They appeared as grey _TEMPLATE_R?,
_TEMPLATE_C?, _TEMPLATE_U_REG? etc. ~5000mm off-sheet - invisible during
normal work but triggering a crash on accidental box-select.

Discovered via live testing on a real JLCPCB/KiCAD 9 project.

CHANGELOG.md

@@ -2,6 +2,49 @@
 
 All notable changes to the KiCAD MCP Server project are documented here.
 
+## [2.2.1-alpha] - 2026-02-28
+
+### Bug Fixes
+
+- `templates/*.kicad_sch`, `project.py`, `schematic.py`: Update KiCAD schematic format
+  version from `20230121` (KiCAD 7) to `20250114` (KiCAD 9).
+
+  **Root cause:** The MCP server targets KiCAD 9 exclusively – `pcbnew.pyd` is compiled
+  for KiCAD 9.0 / Python 3.11.5, and the server explicitly selects the KiCAD 9 bundled
+  Python on Windows. Generating new schematics with a 2-year-old format tag caused a
+  spurious "This file was created with an older KiCAD version, it will be updated on
+  save" dialog on every newly created schematic, which confused users into thinking
+  something was broken.
+
+  **Fix:** Updated header in all 4 template files and both inline schematic generators
+  (`project.py`, `schematic.py`) to emit `(version 20250114)`.
+
+- `template_with_symbols_expanded.kicad_sch`: Remove 13 corrupt `_TEMPLATE_*`
+  placed-symbol blocks containing `(lib_id -100)`.
+
+  **Root cause:** The expanded template was generated by the old sexpdata serializer
+  (the same corruption PR #40 fixed for the DynamicSymbolLoader add-path). The serializer
+  converted the string `"Device:R"` to the integer `-100`, producing `(lib_id -100)`
+  instead of `(lib_id "Device:R")`. KiCAD cannot resolve an integer as a library
+  reference and crashes with a null-pointer when the user attempts to select or box-select
+  these symbols. They appeared as grey `_TEMPLATE_R?`, `_TEMPLATE_C?`, `_TEMPLATE_U_REG?`
+  etc. labels ~5000 mm outside the sheet boundary – invisible during normal work but
+  triggering a crash when accidentally selected.
+
+  **Discovered via:** Live testing on a real JLCPCB/KiCAD 9 project where Claude Desktop
+  (via MCP) created a schematic from the expanded template.
+
+  **Fix:** Removed all 13 `_TEMPLATE_*` placed-symbol blocks using parenthesis-depth
+  tracking (same text-manipulation approach as PR #40). The `lib_symbols` section
+  (symbol definitions) is unchanged – only the corrupt placed instances were removed.
+
+  **Affected users:** Any schematic created from `template_with_symbols_expanded.kicad_sch`
+  before this fix contains the same corrupt blocks. To clean an existing schematic,
+  remove all `(symbol (lib_id -100) ...)` blocks whose `Reference` property starts
+  with `_TEMPLATE_`.
+
+---
+
 ## [2.2.0-alpha] - 2026-02-27
 
 ### New MCP Tools (TypeScript layer – previously Python-only)
@@ -36,7 +79,7 @@ All notable changes to the KiCAD MCP Server project are documented here.
 - `library.py`: Fix loop variable shadowing `Path` object (mypy)
 - `design_rules.py`: Add type annotation for `violation_counts` (mypy)
 
-### Pending additions (not yet committed)
+### New MCP Tools (cont.)
 
 **Datasheet tools:**
 - `get_datasheet_url` - Return LCSC datasheet PDF URL and product page URL for a given
@@ -53,7 +96,7 @@ All notable changes to the KiCAD MCP Server project are documented here.
 - `delete_schematic_component` - Remove a placed symbol from a `.kicad_sch` file by
   reference designator (e.g. `R1`, `U3`).
 
-### Bug Fixes (pending)
+### Bug Fixes (cont.)
 
 - `schematic.ts` / `kicad_interface.py`: Fix missing `delete_schematic_component` MCP tool.
 
@@ -75,7 +118,7 @@ All notable changes to the KiCAD MCP Server project are documented here.
   - Error message explicitly guides the user when the wrong tool is used:
     *"note: this tool removes schematic symbols, use delete_component for PCB footprints"*
 
-### Pending fixes (not yet committed)
+### Additional Bug Fixes
 
 - `connection_schematic.py` / `kicad_interface.py`: Fix `generate_netlist` missing
   `schematic_path` parameter – without it `get_net_connections` always fell back to